Preparation and structure‐property relationships of polymeric materials containing arylenevinylene segments — perspectives for new light‐emitting materials

Greiner, Andreas; Bolle, Babett; Hesemann, Peter; Oberski, Josef M.; Sander, R.

doi:10.1002/macp.1996.021970109

Cited by 49 publications

(23 citation statements)

References 54 publications

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“…The synthetic procedures of monomers 6 and 7 , polymers P3 – P5 (Scheme ), and model compounds M1 and M3 – M5 (Scheme ) were analogous to that provided elsewhere 15, 16, 25. All compounds were identified by 1 H NMR, Fourier transform infrared spectroscopy (FTIR), and elemental analysis (EA).…”

Section: Methodsmentioning

confidence: 99%

Hsp70 prevents nitric oxide–induced apoptosis in articular chondrocytes

Terauchi

Takahashi

Arai

et al. 2003

Arthritis & Rheumatism

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Objective. To deliver and overexpress the hsp70 gene in cultured chondrocytes to investigate its effect on nitric oxide (NO)-induced apoptosis of chondrocytes.Methods. Primary chondrocyte cultures were established from rabbit joints. The cells were transduced with an empty adenovirus vector (Ax1w) or an adenovirus vector harboring the hsp70 E-tag fusion gene (AxSHEwt Degradation of articular cartilage, the major component of a joint, causes serious dysfunction of joints. Osteoarthritis (OA) is associated with degeneration of articular cartilage, but its pathogenesis has not yet been fully elucidated. Various biologic and chemical stress factors are thought to be involved in the occurrence and progression of OA, including mechanical stress, inflammatory cytokines such as interleukin-1 (IL-1) and tumor necrosis factor ␣, and reactive oxygen species (ROS) such as nitric oxide (NO). Chondrocytes are responsible for the maintenance of articular cartilage. Reduced cartilage cellularity has been postulated to play a role in the pathogenesis of OA (1,2), and the reduction in cellularity in human OA cartilage is partly attributable to apoptosis, i.e., programmed cell death. Recent studies have shown apoptosis of articular chondrocytes in OA in humans and in experimental animals (3,4), which implies the importance of apoptosis in the progression of the pathology of OA. Thus, apoptosis has attracted the attention of researchers as a potential etiologic factor in OA progression (5). If apoptosis of OA chondrocytes could be controlled, the implications of apoptosis in OA pathogenesis would become clearer, and the suppression method would suggest a novel therapeutic intervention against OA.One of the major cellular responses to stress involves synthesis of a set of highly conserved proteins, called heat-shock proteins (HSPs), during a process referred to as the stress response. In mammalian systems, HSPs include proteins with molecular weights of 110, 90, 70, 60, 40, and 27 kd. Some HSP members are constitutively expressed, and the expression levels increase in response to stress, while others are induced after exposure to stress. HSPs not only protect cells from stress-induced damage, but also facilitate the recovery of cells from the damage by binding to degraded or misfolded polypeptides (6-8). The inducible Hsp70 is a major HSP, and its expression is augmented in OA

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Section: Methodsmentioning

confidence: 99%

Hsp70 prevents nitric oxide–induced apoptosis in articular chondrocytes

Terauchi

Takahashi

Arai

et al. 2003

Arthritis & Rheumatism

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“…[1][2][3][4][5][6][7][8] However, conducting polymers have poor mechanical and physical properties. [1][2][3][4][5][6][7][8] However, conducting polymers have poor mechanical and physical properties.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical preparation and characterization of novel polyethylene/polyindene and polystyrene/polyindene composites

Talu

Uzluk

Sarı

et al. 2012

J of Applied Polymer Sci

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In this study, the conducting homopolymer of indene and polyethylene/polyindene (PE/PIn) and polystyrene/polyindene (PS/PIn) composites have been electrochemically synthesized on platinum electrode in nonaqueous acetonitrile. The physical, electrochemical, thermal, and spectral properties of the synthesized PIn and their composites were investigated. The conductivities of PIn and the composites were measured with a four-probe technique. The conductivity of PIn was determined as 7.86 Â 10 À4 S/cm, whereas the conductivities of the PE/PIn and PS/PIn composites were determined to 6.42 Â 10 À5 S/cm and 5.64 Â 10 À5 S/cm, respectively. From Gouy scale magnetic susceptibility measurements, it was found that PIn and the composites had bipolaron natures. Fourier transform infrared spectra were taken to analyze the structural properties of PIn and the composites. The thermal properties of PIn and the PE/PIn and PS/PIn composites were investigated with thermogravimetric analysis, and it was found that they showed adequate thermal stability. According to the initial decomposition temperature among the composites, the composite including PE had the highest decomposition temperature with 450 C. The synthesized composites were different in aspect of morphology when compared to PIn.

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“…Research interest in organometallic chemistry has increased greatly in recent years with the great hope that they may have many other different applications in various areas. The most important applications which were presented in the last decades included nonlinear optical (NLO) devices [7], light emitting diodes [9], electrochemical sensors [10], thin film transistors [11] and liquid crystals [12]. It may be the case that the cooperation between such derivatives with different polymeric structures is a good strategy for the easy processing of these residues and possibly may lead to enhancement of their properties.…”

Section: Introductionmentioning

confidence: 99%

Organometallic Ferrocene- and Phosphorus-Containing Polymers: Synthesis and Characterization

Hussein

Asiri

2012

Designed Monomers and Polymers

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The inclusion of organometallic units into polymeric structures has attracted much attention in different fields according to the nature and behaviour of the inserted metal. Moreover, the discovery of organometallic polymers and their structural characterization initiated an explosive rebirth of organometallic chemistry. Organometallic moieties are in or pendent to the polymer backbone and examine some of the uses of the emergent metallocene polymers, and new uses are still being found for these remarkable organometallic moieties. This review gives a simple introduction to variable organometallic molecules and their characteristics. This review will focus on the syntheses and characterization of organometallic polymers, including ferrocene-and phosphorus-containing polymers. A general overview on ferrocene polymers with a special attention to ferrocene-containing liquid crystalline polymers (including a ferrocene moiety in the main chain, side-chain or dendrimers) and fullerene-ferrocene liquid crystalline polymers is presented. In addition, more details for synthesis and properties of phosphorus-containing polymers are illustrated.

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Preparation and structure‐property relationships of polymeric materials containing arylenevinylene segments — perspectives for new light‐emitting materials

Cited by 49 publications

References 54 publications

Hsp70 prevents nitric oxide–induced apoptosis in articular chondrocytes

Hsp70 prevents nitric oxide–induced apoptosis in articular chondrocytes

Electrochemical preparation and characterization of novel polyethylene/polyindene and polystyrene/polyindene composites

Organometallic Ferrocene- and Phosphorus-Containing Polymers: Synthesis and Characterization

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